EUTAENIA VAGRANS. 155 



Obsery. — This appears to be a widely spread species over the North 

 American continent. The specimen brought home by the Expedition 

 is about twelve inches in total length, that is, somewhat below the 

 average size. 



Descr. — The anteorbital plate is quite narrow inferiorly. Of the 

 two postorbitals, the inferior one is by far the highest. The inferior 

 rim of the orbit is formed by the fourth and fifth labials. 



Compared with its nearest neighbor, E. leptocepliala, it differs in 

 having the exterior row of dorsal scales large and carinated, the next 

 row scarcely, if at all, larger than the rest. The caudal scales are 

 strongly carinated. The labial plates being very much developed. It 

 is provided likewise with twenty-one rows of dorsal scales, and one 

 hundred and six, not one hundred and thirty, spots, in series, from 

 head to anus. The head is larger and much arched. 



The abdominal scutellae are one hundred and sixty-one in number; 

 the subcaudal ones fifty- three. 



Above light-brown ; beneath slate-color (sometimes black), with the 

 margins of the scutellae black. A dorsal line occupying a single row 

 of scales, of a dull yellowish color, the tint occasionally running into 

 the adjoining row. On each side of this, are two .series of small black 

 spots, occupying generally a single scale, and varying from ninety-five 

 to one hundred and five, from the occiput to the anus. The upper 

 series runs along the second row of scales from the vertebral row; the 

 lower series alono: the seventh. 



^a 



Log. — The specimen figured is from Puget Sound, Oregon. 



Plate Xiy, fig. 5, represents Eutaenia vagrans, size of life. 



Fig. 6, is a profile of the head. 



Fig. 7, an upper view of the same region. 



Fig. 8, a view from beneath. 



Fig. 9, exhibits the dorsal scales. 



Fig. 10, the vent and adjoining scutellae. 



Figs. 7-10, are magnified about one half their diameter. 



